http://dunlopracing.com/technical-info/
I wondered the same.
From what I have read,the 211's are a much better tire,the UK versions are the best but the most expensive.
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I haven't rode Mid-O yet,but from watching racing there I can say that it's a lot more technical than Nelson Ledges or PIRC.
I have heard that Putnam is a great beginner track.
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